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(!!!!) (Single) 6BK7B RCA NOS 1960's faded printing (7.4/7.4ma)
(!!!!) (Single) 6BK7B RCA NOS 1962 (7.4/8.3ma)
(!!!!) (GE Pair) 6BQ7A GE NOS "O" getter halo 1973-1980 (10.5/9.7ma and 11.4/9.4ma) (Schiit, DNA, Modwright)
(!!!!) (GE Pair) 6BQ7A GE NOS "O" getter halo 1976 (7/10ma and 7/9ma) (Schiit, DNA, Modwright)
(!) (BEST PAIR) 5BZ7=5BQ7A GE gray plates NOS 1971 (10.8/10.6ma and 10/9.3ma)
5BZ7=5BQ7A GE gray plates NOS 1971 (13/16.2ma)
5BQ7A Tungsol black plates NOS 1960 era (13.2/12.2ma)
(!) (PAIR) 5BQ7A Raytheon by Sylvania gray plates NOS 1970 era (10.4/9.4ma and 9.4/9.6ma)
